#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
void Func(char*killer)
{
	for (char kill = 'A'; kill <= 'D'; kill++)
	{
		if (((kill != 'A' )+ (kill == 'C') + (kill == 'D') +( kill != 'D') )== 3)
			*killer = kill;
	}
}

int main()
{
	char killer;
	Func(&killer);
	printf("%c", killer);
	return 0;
}